Trolley-wire hanger



(No Model.)

W A, MGUALLUM- v OL BY WIRE HANGER. No. 602,468,

PatentedAprJlQ, 1898.

5%, N m .2 M Y f W pauying drawings, in whichlllyinventionrelatesto hangerscmployed in electric-railway service to suspend the ears carrying the trolley-wire from H J cross-wires jeeted. My ini cntion intendc to provide support a bolt B, of hard rubber or other inor stem of the insulated bolt is threaded in WILLIAM A. MCCALLUM,

TROLLEY-W'l PATENT OFFICE.

or ()iNUINNATI, onio.

RE HANG ER.

SPECIFICATION forming part of Letters Patent No. 602,463, dated April 19, 1898.

Be it known that l, \VILLIAM A. COAL- LUiI, al'citizen of the United States, residing at Gincinnati, Ohio, have invented new and useful improvements in Trolley- Nire Hangers, \of which the following is a specification.

attached to poles. In the structures as heretofore made more or less difiiculty has been enperienced from the tendency of the parts to";becomeunscrewed and work loose under the constant vibration to which they are suba remedy forthis evil an 1 is a simpe andpractica'l construction easily made and kept in order; and to this endit consists inthe hanger constructed as herein set forth and claimed, in which the principal features of novelty are in providing the hanger cap and the point of the insulated bolt with oppositely-cut threads, providing the inner face of the hanger-cap. and the upper surface of the insulated bolt with radial dentations and intcrposing betwoen these a compressible washer to form a lock to prevent interrelation under normal conditions, but allow of forcible displacement in taking apart. Thus the insulated bolt is prevented from rotating while in use by the cap, and the cap prevented from ro tating by the bolt and compressible washer.

My invention is illustrated in-the accom- Figure 1 is a general side elevation'of the device complete; Fig. 2, a similar view crosssec ioned to show construction; Fig. 3, a plan view of the device with cap removed, and Fig. -l a side elevation of the insulated bolt detached.

Referring now to the drawings, A designates the holder or hanger proper, which is in; the form of an inverted funnel with an upward cylindrical extension, countersunk interiorly to form a shoulder a to receive and sulat-ing material, embodying a metal stem 0, projectingvbelow the funnel. The lower end the usual manner to engage the ear d, (indicated by dotted lines, Fig. 1,) to which is C 1UPGI the trolley-wire, as is customary.

Serial No. 648.394. (N0 model.)

The holder may be provided with opposite lateral wings iv, with grooved seats for engagementl of the cross-wire w, or is otherwise suitably provided to suspend the device- 'from the supporting poles.

The upper surface of the insulated bolt is a little above the upper margin of the holder and-is serrated with radial teeth-such, for

example, as indicated in the figureshaving such relation to the threads of the cap as that I when the latter is screwed home the teeth would prevent back movement if they were in side contact. This function is accomplished by the interposition of a washer f of somewhat elastic material, such as a disk of leather or of rubber, between the cap and the upper surface of the insulated bolt 13,, which disk, being-compressed between the indented surfaces as the surfaces are drawn closer together in screwing downthe cap, engages the opposite toothed surfaces and prevents ordinary, displacement, yet permits the cap to be taken off when necessary by reverse movement of the parts. any rotation of the insulated bolt B tending to unseat from the ear d rotates-the cap E by the agency of the disk f and causes it to seat more'closely on the holder A. The s the opc posite threads of the cap E and of the bolt B,

in conjunction with the disk f and the ratchetteeth of the bolt and cap, serve as a check against displacement either of the cap from the boltgor of the bolt from the ear (I, while at the sametime constituting a simple prac-" tical construction easily made and applied.

I claim as myinvention and desire to secure byLetters Patent of the United States 1. In a line-hanger of the character indicated, the combination of the holder the screw-cap having its inner face provided with teethor corrugations adapted to engage by It will be seen also that backward rotation of the screw-cap; the inscrew-threaded eap having a corresponding inner face; the suspending end of the bolt threaded oppositely from the cap; and the compressible washer interposed betimmi the cap and the insnlaleil bolt, substantially as set forth.

in testimony whereof i have hereunto set 15 my hand in ihe presenee of two subscribing Witnesses.

i \Yll'ililli fil j li'CAlliLUM.

Witnesses:

L. Iii. llUSl-JA, HEnBEnr J. AliLbLIi. 

